Session Report

Summary:

Test run at: 2021-07-29 20:47:25 GMT
Client Prefix (v4): 172.250.66.x/24
Client AS (v4): 20001 (TWC-20001-PACWEST)
IPv4 Probes: 66
Client Prefix (v6): 2603:8001:95xx::/40
Client AS (v6): 20001 (TWC-20001-PACWEST)
IPv6 Probes: 56

Outbound spoofing summary (from the client to our server)
Source address type	IPv4		IPv6
Private - RFC1918 or ULA	unknown		unknown
Routable	unknown		unknown
Largest spoofable neighbor prefix length	none		none

Spoof status key
received		Spoofed packet was received.	✔	Pattern of tests from this IP block indicates a switch from allowing spoofing to blocking it.
rewritten		Spoofed packet was received, but the source address was changed en route.
blocked		Spoofed packet was not received, but unspoofed packet was.
unknown		Neither spoofed nor unspoofed packet was received.

Warnings:

• ⚠️ The spoofer client was unable to send spoofed headers due to an operating system restriction.

IPv4 AS Route:

This test run probed the following paths in order to infer your ability to send different spoofed source packets. Each node in the graph corresponds to an autonomous system, i.e. different Internet service providers. NOTE: This graph does NOT show if an AS blocks spoofed packets, only the path taken by received spoofed packets. The IP Path Details are available for this run. If non-spoofed packets weren't received at a destination, the traceroute to that destination is not included in this graph and may even cause a totally empty graph.

IPv4 Adjacent Netblock Testing:

Your host (172.250.66.x/24) can spoof 0 neighboring addresses

Spoofed source address (anon)	Prefix Length	ASN of spoofed source address	Received
172.250.66.x/24	/31	20001	sendto
172.250.66.x/24	/30	20001	sendto
172.250.66.x/24	/29	20001	sendto
172.250.66.x/24	/28	20001	sendto
172.250.66.x/24	/27	20001	sendto
172.250.66.x/24	/26	20001	sendto
172.250.66.x/24	/25	20001	sendto
172.250.66.x/24	/24	20001	sendto
172.250.67.x/24	/23	20001	sendto
172.250.64.x/24	/22	20001	sendto
172.250.70.x/24	/21	20001	sendto
172.250.74.x/24	/20	20001	sendto
172.250.82.x/24	/19	20001	sendto
172.250.98.x/24	/18	20001	sendto
172.250.2.x/24	/17	20001	sendto
172.250.194.x/24	/16	20001	sendto
172.251.66.x/24	/15	20001	sendto
172.248.66.x/24	/14	20001	sendto
172.254.66.x/24	/13	12271	sendto
172.242.66.x/24	/12	7155	sendto
172.234.66.x/24	/11	20940	sendto
172.218.66.x/24	/10	852	sendto
172.186.66.x/24	/9	10310	sendto
172.122.66.x/24	/8	2497	sendto

Meaning of status in Received column:

sendto

The spoofer client was unable to send spoofed headers due to an operating system restriction.

IPv4 Outbound Filtering Depth:

The tracefilter test found your host unable to spoof routable, non-adjacent source addresses through even the first IP hop.

IPv6 probes:

Spoofed source address	Destination	Received
2001:48d0:101:501::159	2001:48d0:101:501::242	no
2001:4978:1fb:6400::d2	2001:48d0:101:501::242	no
2001:49aa:111:aa00::11	2001:48d0:101:501::242	no
fd11:1111:1111::1111	2001:48d0:101:501::242	no

IPv6 Adjacent Netblock Testing:

Spoofed source address (anon)	Prefix Length	ASN of spoofed source address	Received
2603:8001:95xx::/40	/120	20001	sendto
2603:8001:95xx::/40	/112	20001	sendto
2603:8001:95xx::/40	/104	20001	sendto
2603:8001:95xx::/40	/96	20001	sendto
2603:8001:95xx::/40	/88	20001	sendto
2603:8001:95xx::/40	/80	20001	sendto
2603:8001:95xx::/40	/72	20001	sendto
2603:8001:95xx::/40	/64	20001	sendto
2603:8001:95xx::/40	/56	20001	sendto
2603:8001:95xx::/40	/48	20001	sendto
2603:8001:95xx::/40	/40	20001	sendto
2603:8001:15xx::/40	/32	20001	sendto
2603:8081:95xx::/40	/24	11427	sendto
2603:1:95xx::/40	/16	UNROUTED	sendto

Meaning of status in Received column:

sendto

The spoofer client was unable to send spoofed headers due to an operating system restriction.

Summary:

The results from all tests are aggregated to produce a summary "State of IP Spoofing" report.

Feedback:

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